摘要:
Compounds of general formula (I) ##STR1## (where R.sup.1 is a carboxyl group, a group COO.sup..crclbar. or a blocked carboxyl group;R.sup.2 is an amino or protected amino group; andR is hydrogen or a group of the formula CH.sub.2 X, where X represents a halogen atom, a hydroxyl group, an acetoxy group; a group of the formula O.CO.NHR.sup.3, where R.sup.3 is hydrogen, a C.sub.1-4 alkyl group optionally substituted by 1 to 3 halogen atoms or an N-protecting group; a group of the formula OR.sup.4, where R.sup.4 is a C.sub.1-4 alkyl group optionally substituted by halogen or a C.sub.1-4 alkoxy group; or a pyridinium, 3-carbamoyl-pyridinium or 4-carbamoyl-pyridinium group;B is --S-- or --SO-- (.alpha.- or .beta.-); and the dotted line bridging the 2-, 3- and 4- positions indicates that the compound is a ceph-2-em or ceph-3-em compound) and salts thereof, the compounds of formula (I) being associated with an anion when X represents a pyridinium, 3-carbamoylpyridinium group or a 4-carbamoylpyridinium group and R.sup.1 is other than COO.sup..crclbar.) are disclosed.Processes for their preparation and pharmaceutical compositions containing them are also disclosed.
摘要:
Compounds of general formula I ##STR1## (wherein R represents NH.sub.2 -- or an acylated or silylated amino group;R.sup.2 represents a hydrogen, halogen, alkyl, aryl, carboxyl or lower alkoxycarbonyl group;R.sup.3 is hydrogen or a carboxyl blocking group;B is >Sor>S.fwdarw.O (.alpha.- or .beta.-); and the dotted line represents .DELTA..sup.2 or .DELTA..sup.3 unsaturation) and salts, solvates and esters thereof are described.Compounds where R.sup.3 is hydrogen, the dotted line represents .DELTA..sup.3 unsaturation and R is a group of formula ##STR2## (where R.sup.a is an optionally substituted heterocyclic aryl group having one or more hetero atoms selected from S, N and O in the ring, R.sup.b is an optionally substituted aryl group, R.sup.c is hydrogen, acyl, alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkylalkyl, aryl or aralkyl, R.sup.d is as defined for R.sup.a or is an optionally substituted group and X is amino, hydroxyl, acylated hydroxyl, carboxyl or esterified carboxyl)and especially the compounds in which B is >S, have valuable antibiotic activities.Compounds in which the --CH.dbd.CH--C.tbd.C--R.sup.2 group is in the trans configuration have been found to have good oral absorption.The remaining compounds of formula (I) are valuable as intermediates in processes for the preparation of the above active antibiotics, which processes are also described.
摘要翻译:通式I的化合物(I)(其中R表示NH 2 - 或酰化或甲硅烷基化的氨基; R 2表示氢,卤素,烷基,芳基,羧基或低级烷氧基羰基; R 3是氢或羧基封端基 ; B是> Sor> S-> O(α-或β-);虚线代表DELTA 2或DELTA 3不饱和键)及其盐,溶剂合物和酯。 其中R 3为氢的化合物,虚线表示DELTA 3不饱和度,R为式R a R 2 CONH(R a)的基团,其中R a为具有一个或多个选自S,N和O的杂原子的任选取代的杂环芳基 在环中,R b是任选取代的芳基,R c是氢,酰基,烷基,烯基,炔基,环烷基,环烷基烷基,芳基或芳烷基,Rd如对Ra定义或是任选取代的基团,X是氨基,羟基 ,酰化羟基,羧基或酯化羧基),特别是其中B> S的化合物具有有价值的抗生素活性。 已经发现其中-CH = CH-C 3 D C-R 2基团处于反式构型的化合物具有良好的口服吸收。 剩余的式(I)化合物在制备上述活性抗生素的方法中作为中间体是有价值的,该方法也被描述。
摘要:
A utilities pod (10) for a vehicle, especially a caravan. The pod is removably mounted underneath the cabin structure and contains utilities apparatus such as a water heater, space heater (62), battery and water tank (60). The pod is connected to the cabin of the vehicle by an interface unit having multiple ports (18) by which said respective utility services are provided to the cabin. The interface unit is configured for installation in the floor of said cabin such that the ports are exposed to the interior of the cabin structure.
摘要:
Systems and methods are provided for aligning printheads of a printing system. The system comprises a sensor and a controller. The sensor is able to detect changes in a lateral position of a web of print media traveling through a continuous-forms printing system, and the controller is able to adjust a lateral position of a printhead while the printing system is operating to compensate for the detected changes in web position.
摘要:
An aerodynamic braking system is disclosed herein. In particular, the brake arms may define an aerodynamic leading portion or edge and may be integrated into the legs of the front fork. Also, the brake arms may be disposed behind the bottom bracket shell to take the rear brake out of the air flow path and reduce aerodynamic drag. The rear brake arms are tapered so that the brake arms remain sufficient stiff to provide sufficient brake response times. The rear brake arms may be matched to recesses formed on an underside of chain stays.
摘要:
A dispenser comprises a housing that has a removable tamper proof protective cap and tamper proof ring and is threaded to a container. The container, which is the main package, holds the supplemental component. The housing holds the first component into a plunger type chamber in a fully retracted position and is sealed from the supplemental component. The chamber has a delivery end that is closed before use. When pushed all the way in, the chamber's delivery end becomes open and delivers the first component into the main package.
摘要:
According to one embodiment of the invention, an architecture is provided for a data processing system that processes data for a service provider itself or a client of a service provider as in the case of a third party processor. The elements of the architecture can be managed separately. For example, the architecture can be organized around eight subject areas, such as account, party, communication point, presentation instrument, rules, balances, transactions, and product. Relationships between each of the subject areas as well as between sub-types of each subject area can be established to provide flexibility in the management of the data.
摘要:
A dispenser comprises a housing that has a removable tamper proof protective cap and tamper proof ring and is threaded to a container. The container, which is the main package, holds the supplemental component. The housing holds the first component into a plunger type chamber in a fully retracted position and is sealed from the supplemental component. The chamber has a delivery end that is closed before use. When pushed all the way in, the chamber's delivery end becomes open and delivers the first component into the main package.
摘要:
The present invention concerns a privacy booth comprising at least two partition members having first and second terminal ends; and at least two linking members having first and second opposed ends, each second terminal end of the partition member and each first opposed end of the linking members forming a first pivotable coupling, each first terminal end of the partition members and each second opposed end of the linking member forming a second pivotable coupling, the privacy booth being operable between a deployed state, in which adjacent partition members are spaced-apart to define a respective compartment therebetween, and a storage state in which adjacent partition members are substantially parallel with one another, and preferably flat packed against one another.